1、Aluminum Alloy: Using high strength aluminum alloy, the hardness and performance are greatly improved. 2、Anodizing Process: The anodizing process makes this bike rotor that has strong texture and beautiful color. 3、Positive and Negative Gear Design: Make the chain smoother and more stable. New tooth plus and minus with extended chamfer. 4、CNC Finishing: T6 heat treatment, lighter weight and higher strength, the main body is made of classic original silver, making the disc nicer. 5、Hollow Design: The hollow weight reduces the weight of the disc, and the design of mud and water drainage improves the riding experience. Item Type: Bicycle Chainring Material: Aluminum Alloy Size: Approx. 154x154mm / 6x6in Applicable Models: For Shimano M7100, for M8100, for M9100 1 x Disc Brake